SNC-Protected Communication Paths in SAP Systems 

The following components support the use of SNC for connections.

SNC protection only applies to connections that use SAP protocols (dialog, RFC or CPIC) protocols. For Internet protocols, use SSL for protection.

SNC-Protected Communication Paths

From	To	Comment
SAP GUI for Windows or SAP GUI for Java	SAP system application server
SAP system application server	SAP lpd
External RFC or CPIC program	SAP system application server	Example: SAP Java Connector
SAP system application server	External RFC or CPIC program	Example: SAP Java Connector
SAProuter	SAP system application server
SAProuter	SAProuter
Internet Transaction Server	SAP system application server

You cannot apply SNC protection to the communication path between your application servers and your database. Therefore, we recommend you keep your application and database servers in a secured LAN that is protected with a firewall and SAProuter (see the graphic below).

Network Area Protected with SNC

You can also use SNC between two SAProuters to build a secure tunnel between networks (see the graphic below).

SNC Protection between SAProuters